Figure 2.

α-Amylase inhibitory activity of fractions collected from the columns. (A) Crude extract and F1–F5 collected from the AB-8 macroporous adsorption resin column (at a concentration of 1000 µg/mL). (B) F1-1–F1-5 collected from the Sephadex LH-20 column (at a concentration of 600 µg/mL). (C) F1-2-1–F1-2-4 collected from the C₁₈ reversed-phase silica gel column (at a concentration of 200 µg/mL). Different letters above the columns in the same figure indicate a significant difference at p < 0.05.